OEM 2003 Chevrolet Venture Brake Master Cylinder

2003 Chevrolet Venture Brake Master Cylinder Parts and Q&A

• Q: How to service and repair the Brake Master Cylinder on 2003 Chevrolet Venture?

  A: Service and repair of the Brake Master Cylinder requires mounting flange fixation to a bench vise with back access to the primary Piston area. Install proper mounting connections directly to the ports of the master cylinder using fittings that fit designed flare specifications and enable hose connection. Lead the fittings into the master cylinder reservoir through attachments of clear hoses. Use delco supreme 11 (GM P/N 12377967, Canadian P/N 992667) or equivalent dot-3 brake fluid from a clean, sealed container to fill the reservoir until it reaches at least the halfway point. Make sure the ends of the hoses stay completely underwater. Release and depress the primary Piston multiple times with a round-ended tool while observing fluid flow through the ports to a depth of 25 mm (1 inch). When air is bled from the primary and secondary pistons the needed force to depress the primary Piston elevates while its movement shortens. Repetition of the process should continue until the ports show unrestricted fluid movement that completely excludes air bubbles. To finish the process extract transparent hoses from the reservoir and install both the master cylinder reservoir cap and diaphragm before taking off the fittings with hoses from ports while using a shop cloth to wrap around the master cylinder and finally extracting it from the vise.